/*
* Copyright (c) LSE
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY LSE AS IS AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL LSE BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "libk.h"

t_melody*	load_sound(const char* path)
{
  t_melody*	melody = NULL;
  int		fd = -1;
  int		nb = -1;
  int		i = -1;
  char		*magic = ".KSF";
  char		buf[5];

  if ((fd = open(path, O_RDONLY)) < 0)
    return NULL;

  buf[5] = 0;
  /* check the magic number */
  if ((read(fd, buf, 4) != 4) || (strcmp(magic, buf) != 0))
    {
      close (fd);
      return NULL;
    }

  /* read the numbers of tones */
  if (read(fd, &nb, sizeof (int)) != sizeof (int))
    {
      close (fd);
      return NULL;
    }

  /* allocate space to store the new melody */
  if (!(melody = malloc((nb + 1) * sizeof (t_melody))))
    {
      close (fd);
      return NULL;
    }

  /* load the melody */
  for (i = 0; i < nb; i++)
    {
      if (read(fd, &melody[i].freq, sizeof (int)) != sizeof (int) ||
	  read(fd, &melody[i].duration, sizeof (int)) != sizeof (int))
	{
	  close (fd);
	  free (melody);
	  return NULL;
	}
    }

  /* put a null tones to indicate end of melody */
  melody[nb].freq = 0;
  melody[nb].duration = (unsigned long)-1;

  close(fd);

  return (melody);
}


void		clear_sound(t_melody* melody)
{
  free(melody);
}
